jQuery select SPAN with specific Attribute

    <div>
        <span style="color:red"></span>
        <span style="display:none"></span>
    </div>
    <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
    <script type="text/javascript">
        $(function () {
            //Will get all HTML SPAN with style tag. 
            var spans1 = $("span[style]");
            alert(spans1.length);

            //Will get SPAN with display:none
            var spans2 = $("span[style='display:none']");
            alert(spans2.length);
        });
    </script>